Clip-on timer



FIG. 1 is a perspective view of a clip-on timer showing my new design from the front, top and one side;

FIG. 2 is a perspective view thereof shown from the back, bottom and one side;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is bottom plan view thereof;

FIG. 6 is a side elevation view thereof, the opposite side being a mirror image of that shown; and,

FIG. 7 is rear elevation view thereof. 

The ornamental design for a clip-on timer, as shown and described. 